<strong>Yahoo Message Number: 78688</strong>Don,<br/><br/>There was an option for an electric heater in the system. <br/>If you have two switches (house type light switches) over the main breaker box panel you have the option. <br/>Also, there will be a box piped into the system in the engine compartment. <br/>Roger<br/><br/>2002 Affinity #6425